[PATCH 0/6] Maintain the relative size of fs.file-max and fs.nr_open
From: Jinliang Zheng
Date: Sat Nov 23 2024 - 13:09:18 EST
According to Documentation/admin-guide/sysctl/fs.rst, fs.nr_open and
fs.file-max represent the number of file-handles that can be opened
by each process and the entire system, respectively.
Therefore, it's necessary to maintain a relative size between them,
meaning we should ensure that files_stat.max_files is not less than
sysctl_nr_open.
However, this point is overlooked in the current kernel code, and
this patchset aims to rectify this. Additionally, patch 0001 fixes
the type issue with the sysctl_nr_open handler.
Jinliang Zheng (6):
fs: fix proc_handler for sysctl_nr_open
fs: make files_stat globally visible
sysctl: refactor __do_proc_doulongvec_minmax()
sysctl: ensure files_stat.max_files is not less than sysctl_nr_open
sysctl: ensure sysctl_nr_open is not greater than files_stat.max_files
fs: synchronize the access of fs.file-max and fs.nr_open
fs/file_table.c | 15 ++++++++---
include/linux/fs.h | 2 ++
include/linux/sysctl.h | 4 +++
kernel/sysctl.c | 59 ++++++++++++++++++++++++++++++++++++++----
4 files changed, 71 insertions(+), 9 deletions(-)
--
2.41.1